| C05NBF | Solution of system of nonlinear equations using function values only (easy-to-use) |
| C05NCF | Solution of system of nonlinear equations using function values only (comprehensive) |
| C05NDF | Solution of system of nonlinear equations using function values only (reverse communication) |
| C05PBF | Solution of system of nonlinear equations using first derivatives (easy-to-use) |
| C05PCF | Solution of system of nonlinear equations using first derivatives (comprehensive) |
| C05PDF/C05PDA | Solution of system of nonlinear equations using first derivatives (reverse communication) |